Cool story. :)
I got a question about firecracker powder.
Back in high school (late 60's) I would compare my homemade fire- cracker powder to what came inside any and all cherry bombs etc I could get my hands on and eneded up with some mighty fine powder! :)
So fast forward to the late 90's and got my hands on a "dud" aerial salute (young friend gave it to me) and of course did the same, but found their powder (looked like mine, G dark) was quite abit stonger than mine.
I haven't done my homwork on that :/ so don't have any answers just questions.
Antimony sulfide is my only guess at this point and don't feel like it's a good one. :/
I know you can't tell me here or even email, it's up to me to figure it out on my own. I want to know the answers whether I act on it or not tho! :)
Got any suggestions on where to look (begin again;)? :)
My favorite trick is to make everyone guess "how high" the 5 gallon bucket will go with -this- firecracker under it. One inch bore, hardly ever made anything bigger. You know what happens. :) But they don't... it gets ripped to pieces. But it's cool to get them to picture the strength ahead of time then find out there's a lot more energy in there than they thought. :)
Pressure cooker lid is another favorite of mine, right after gathering up the 5 gallon can pieces. ;)
Alvin in AZ